diff --git a/src/ScadaLink.Commons/Types/DataConnections/OpcUaDeadbandConfig.cs b/src/ScadaLink.Commons/Types/DataConnections/OpcUaDeadbandConfig.cs
new file mode 100644
index 0000000..798e8c5
--- /dev/null
+++ b/src/ScadaLink.Commons/Types/DataConnections/OpcUaDeadbandConfig.cs
@@ -0,0 +1,7 @@
+namespace ScadaLink.Commons.Types.DataConnections;
+
+public sealed class OpcUaDeadbandConfig
+{
+    public OpcUaDeadbandType Type { get; set; } = OpcUaDeadbandType.Absolute;
+    public double Value { get; set; } = 0.0;
+}
diff --git a/src/ScadaLink.Commons/Types/DataConnections/OpcUaDeadbandType.cs b/src/ScadaLink.Commons/Types/DataConnections/OpcUaDeadbandType.cs
new file mode 100644
index 0000000..072ce8e
--- /dev/null
+++ b/src/ScadaLink.Commons/Types/DataConnections/OpcUaDeadbandType.cs
@@ -0,0 +1,7 @@
+namespace ScadaLink.Commons.Types.DataConnections;
+
+public enum OpcUaDeadbandType
+{
+    Absolute,
+    Percent
+}
diff --git a/src/ScadaLink.Commons/Types/DataConnections/OpcUaEndpointConfig.cs b/src/ScadaLink.Commons/Types/DataConnections/OpcUaEndpointConfig.cs
index 06f6f63..3d87217 100644
--- a/src/ScadaLink.Commons/Types/DataConnections/OpcUaEndpointConfig.cs
+++ b/src/ScadaLink.Commons/Types/DataConnections/OpcUaEndpointConfig.cs
@@ -18,6 +18,16 @@ public sealed class OpcUaEndpointConfig
     public int KeepAliveCount { get; set; } = 10;
     public int LifetimeCount { get; set; } = 30;
     public int MaxNotificationsPerPublish { get; set; } = 100;
+    public bool DiscardOldest { get; set; } = true;
+    public byte SubscriptionPriority { get; set; } = 0;
+    public string SubscriptionDisplayName { get; set; } = "ScadaLink";
+
+    // Read / filter
+    public OpcUaTimestampsToReturn TimestampsToReturn { get; set; } = OpcUaTimestampsToReturn.Source;
+    public OpcUaDeadbandConfig? Deadband { get; set; }
+
+    // Authentication (optional; null = anonymous)
+    public OpcUaUserIdentityConfig? UserIdentity { get; set; }
 
     // Heartbeat (optional)
     public OpcUaHeartbeatConfig? Heartbeat { get; set; }
diff --git a/src/ScadaLink.Commons/Types/DataConnections/OpcUaTimestampsToReturn.cs b/src/ScadaLink.Commons/Types/DataConnections/OpcUaTimestampsToReturn.cs
new file mode 100644
index 0000000..8faa56f
--- /dev/null
+++ b/src/ScadaLink.Commons/Types/DataConnections/OpcUaTimestampsToReturn.cs
@@ -0,0 +1,8 @@
+namespace ScadaLink.Commons.Types.DataConnections;
+
+public enum OpcUaTimestampsToReturn
+{
+    Source,
+    Server,
+    Both
+}
diff --git a/src/ScadaLink.Commons/Types/DataConnections/OpcUaUserIdentityConfig.cs b/src/ScadaLink.Commons/Types/DataConnections/OpcUaUserIdentityConfig.cs
new file mode 100644
index 0000000..a1bd3a8
--- /dev/null
+++ b/src/ScadaLink.Commons/Types/DataConnections/OpcUaUserIdentityConfig.cs
@@ -0,0 +1,10 @@
+namespace ScadaLink.Commons.Types.DataConnections;
+
+public sealed class OpcUaUserIdentityConfig
+{
+    public OpcUaUserTokenType TokenType { get; set; } = OpcUaUserTokenType.Anonymous;
+    public string Username { get; set; } = "";
+    public string Password { get; set; } = "";
+    public string CertificatePath { get; set; } = "";
+    public string CertificatePassword { get; set; } = "";
+}
diff --git a/src/ScadaLink.Commons/Types/DataConnections/OpcUaUserTokenType.cs b/src/ScadaLink.Commons/Types/DataConnections/OpcUaUserTokenType.cs
new file mode 100644
index 0000000..74f18c8
--- /dev/null
+++ b/src/ScadaLink.Commons/Types/DataConnections/OpcUaUserTokenType.cs
@@ -0,0 +1,8 @@
+namespace ScadaLink.Commons.Types.DataConnections;
+
+public enum OpcUaUserTokenType
+{
+    Anonymous,
+    UsernamePassword,
+    X509Certificate
+}